Paper-mill engine.



No. 732,530. PATENTED JUNE 30, 1903.

G. S. ELDER.

PAPER MILL ENGINE.

' grruonron FILED SEPT. 19, 1902.

N0 MODEL.

14 #0 In? e ys,

Patented June 30, 1903 PATENT OFFICE.

CHARLES SANDS ELDER, OF WESTBROOK, MAINE.

PAPER-MILL ENGINE.

SPECIFICATION forming part of Letters Patent No. 732,530, dated (Tune 30, 1903.

Application filed $eptember 19, I902. $erial No, 124,042. (No model.)

To aZZ whom it may concern:

Be it known that I, CHARLES SANDS ELDER, a citizen of the United States, residing at WVestbr'ook, in the county of Cumberland and State of Maine,have invented certain new and useful Improvements in Paper-Mill Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in paper-engines, and more particularly to What is well known in the art as the Jordan engine. As heretofore constructed the Jordan engine consisted of a conical-shaped shell having a series of angular cutting-knives extending in a longitudinal direction and spaced apart circumferentially around the interior of the shell. These have generally been arranged in two or more series and spaced apart sub stantially equidistant except that at four points ninety degrees apart the knives and blocks were varied by the insertion of what may be called keying-blocks. These consist of a front and back block, each having a straight side and an angular side, and the key proper having two straight sides, whereby it is adapted to be driven in between the back and front blocks, and thus made to hold the blocks and knives firmly in position. As heretofore constructed no knives have been used between the key proper and the front and back blocks, thus leaving a considerable open space, which interfered more or less with the uniform beating up of the pulp. As heretofore constructed the angular spacing-blocks and the front and back blocks have been laminated to facilitate the chipping of them when the knives have become worn, but the keyingblock proper has always been made solid, for the reason that if the keying-block proper, as well as the front and back blocks, were laminated and glued together, as is the custom, the moisture would cause the adjacent edges, where wood comes against wood, to swell and warp.

My invention consists broadly, first, in interposing straight knives with the angular knives; secondly, in inserting straight knives between the front and back key-blocks and the key proper, and, thirdly, in making the and making a part of this application, Figure l is a front elevation of the shell of the engine, the plug being removed and only enough of the blocks being shown laminated to illustrate the construction of the blocks; and Fig. 2 is a plan view of the plug removed from the shell. The construction and operation of these apart from the improvements hereinbefore referred to are the same as in the ordinary Jordan engine.

Same letters of reference refer to like parts. In said drawings, A represents the shell of the engine and B the plug. -Spaced apart cir- 7o cumferentially around the shell are a series of angular cutting-knives 0, extending longitudina-lly thereof, and interposed between said knives are angular spacing-blocks D.

The knives are designed to project slightly above the face of the blocks, as seen at C. These knives wear in use, and it has been the custom when the knives have worn closeto the blocks to remove the plug and chip the surface of the blocks between the knives without taking them out. To facilitate this chip. ping, it has been customary to make the blocks laminated, the several laminae D bein g glued together. At certain points in the shell (here shown at four points distant from each other ninety degrees)are inserted keys,which firmly lock the knives and blocks in position. The keys consist of the front blocks E, the back blocks F, having one straight side and oneangular side, and the key proper, G. Inter- 0 posed between the straight sides of the back block and front block and the key proper are straight knives H. The key proper is made up of two or more laminae I.

Independent of the fact that the straight knives fill the large vacant space otherwise required by the three blocks which goto make up a key, I claim that the straight knives, combined with the angular knives, accomplish a'much more effective and uniform beating 10o up of the pulp than is the case when only angular knives are employed, and I do not hereby intend to limit myself to the use of the straight knives solely between the members which form the key, but the use of straight knives in combination with angular knives in any way is equally within the terms and spirit of my invention.

The advantages of my improved engine are that the plug need not be run so close to the shell, lessening the wear on the knives and the power necessary to run the engine. It also lessens the time required to chip the engine. It also improves the quality of the product, lessening the amount of waste.

Having thus described my invention and its use, I claim- 1. In a paper engine having a suitable shell, angular knives extending longitudinally thereof and spaced apart circumferentially around the interior of the shell, angular spacing-blocks interposed between said knives, keys inserted at stated points between said knives consisting of back and front blocks having one straight side and one angular side and a key proper having both sides straight, in combination with straight knives interin combination with straight knives interposed between said key proper and the straight sides of the back and front members of the key, said key proper being laminated. In testimony whereof I aflix my signature, in presence of two Witnesses, this 12th day of September, 1902.

CHARLES SANDS ELDER. In presence of- ELGIN O. VERRILL, l\.[ARION RICHARDS. 

